NC0046728_Permit Modification_20050922

NPDES DOCUMENT SCANNING COVER !;CIEET
NPDES Permit:
NC0046728
Mooresville / Rocky River WWTP
Document Type:
Permit Issuance
Wasteload Allocation
Authorization to Construct (AtC)
PermiEodificationT-
Complete File - Historical
Engineering Alternatives (EAA)
Plan of Action
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Permit
History
Document Date:
September 22, 2005
Thus document is printed on reuse paper - izore any
content on the rewerse side

Michael F. Easley, Governor
State of North Carolina
William G. Ross, Jr., Secretary
Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
September 22, 2005
Mr. Wilce Martin
Utilities Director, Town of Mooresville
P.O. Box 878
Mooresville, North Carolina 28115
Subject: Minor Permit Modification
Permit #NC0046728
Rocky River WWTP
Iredell County
Dear Mr. Martin:
The Division has reviewed the data you submitted on July 15, 2005 and hereby issues a permit
modification to remove monitoring for endrin, heptachlor, and beta-bhc from your permit. Six months of data
submitted by your facility (from January 2005- June 2005) show no detections of these parameters in 24 samples.
Please remove the limits page A(1) from your permit and replace it with the enclosed page.
This permit is issued pursuant to the requirements of North Carolina General Statute 143-215.1 and the
Memorandum of Agreement between North Carolina and the U.S. Environmental Protection Agency dated
May 9,1994 (or as subsequently amended). Please note that this permit is not transferable except after notice to
the Division. The Division may require modification or revocation and reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required by the
Division of Water Quality or permits required by the Division of Land Resources, the Coastal Area
Management Act or any other Federal or Local governmental permit that may be required. If you have any
questions concerning this permit, please contact Toya Fields at telephone number [phone], extension 551.
Sincerely,
Alan W. Klimek, P.E.
cc: Mooresville Regional Office, Surface Water Protection
NPDES Unit
Central Files
EPA Region IV
North Carolina Division of Water Quality
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
toya.fields@ ncmail.net - [phone] x551
FAX [phone]
On the Internet at http://h2o.enr.state.nc.us/

Permit NC0046728
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to
discharge from outfall 001. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT
CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
Weekly
Average
Daily
Maximum
Measurement
Frequency
Sample
Type
Sample
Locationl
Flow
5.2 MGD
Continuous
Recording
I or E
BOD, 5 day, 20 °C2
24.0 mg/L
36.0 mg/L
Daily
Composite
I & E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I & E
NH3 as N
(April 1 to October 31)
2.0 mg/L
6.0 mg/L
Daily
Composite
E
NH3 as N
(November 1 to March 31)
4.0 mg/L
12.0 mg/L
Daily
Composite
E
Dissolved Oxygen3
Daily
Grab
E
Dissolved Oxygen
3/Week
Grab
U & D
Fecal Coliform
(geometric mean)
200 / 100 ml
400 / 100 ml
Daily
Grab
E
Total Residual Chlorines
18 µg/L
Daily
Grab
E
Temperature °C
Daily
Grab
E
Temperature °C
3/Week
Grab
U & D
Total Nitrogen
(NO2 + NO3 + TKN)
Monthly
Composite
E
Total Phosphorus
Monthly
Composite
E
Chronic Toxicity5
Quarterly
Composite
E
Cyanide
2/Month
Grab
E
Total Lead
2/Month
Composite
E
Total Copper
2/Month
Composite
E
Total Zinc
2/Month
Composite
E
pH
Between 6.0 and 9.0 s.u.
Daily
Grab
E
Notes:
1)
I= influent, E= effluent, U= upstream approximately Y2 mile upstream of the outfall. D = downstream at NCSR 2420
and NCSR 1394. Upstream and downstream samples shall be grab samples collected three times per week from June
through September then once per week during the other months of the year. (As a participant in the Yadkin Pee -Dee
River Basin Association, the subject facility is not responsible for conducting the instream monitoring requirements listed above.
Should your membership in the agreement be terminated, you shall notify the Division immediately and the instream monitoring
requirements specified in your permit will be automatically reinstated.)
2) The monthly average effluent BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the
respective influent value (85% removal).
3) The daily average dissolved oxygen effluent concentration shall not be less than 5.0 mg/1.
4) TRC limit will take effect January 1, 2007. Limit and monitoring only apply if chlorine is used for disinfection.
5) Chronic Toxicity (Ceriodaphnia) at 90%: February, May, August & November (see special condition A. (2.)).
There shall be no discharge of floating solids or foam visible in other than trace amounts.

TOWN OF
MOORESVILLE
Utilities Department
Ms. LeToya D. Fields
NPDES Western Permitting Unit
NCDWQ
1617 Mail Service Center
Raleigh, NC 27699-1617
Dear Ms. Fields:
July 15, 2005
Wilce Martin
Utilities Director
Town of Mooresville
P. O. Box 878
Mooresville, NC 28115
[phone]
Fax [phone]
Mobile [phone]
Attached please find a report on pesticide results for the period of January through June of
2005. This report is in response to our permit # NC0046728 requirement for pesticides.
In your letter to us, dated January 25, 2005, it was agreed that bi-weekly monitoring over a
six month period would be acceptable. Using the above schedule would have given us 12
data points. We increased the number of data points to 24 by running true split samples at
two different laboratories.
As you can see by the attached spreadsheet our effluent is clear of pesticides. Based on
these results, we would like to request that the pesticide requirements be removed and
either an amended permit or a letter from your office be issued to us.
Thank you, for all the assistance provided in this matter and if you have any questions
please call me at 704-663-7282 or Mike Lamberth at 704-662-8470.
Cordially
ilce Martin
Utilities Director
Cc: Mike Lamberth, WWTP Supt.
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Effluent Pesticides Results for the Town of Mooresville's Rocky River WWTP, Permit # NC0046728
Date Laboratory Time beta-BHC ucilL Endrin ug/L Heptachlor ug/L
1/12/2005 Prism 8:05 AM <0.05 <0.05 <0.05
1/12/2005 Pace 8:05 AM <0.05 <0.06 <0.05
1/26/2005 Prism 8:06 AM <0.05 <0.05 <0.05
1/26/2005 Pace 8:06 AM <0.05 <0.06 <0.05
2/9/2005 Prism 8:06 AM <0.05 <0.05 <0.05
219/2005 Pace 8:06 AM <0.05 <0.06 <0.05
2/23/2005 Prism 8:04 AM <0.05 <0.05 <0.05
2/23/2005 Pace 8:04 AM <0.05 <0.06 <0.05
3/9/2005 Prism 8:05 AM <0.05 <0.05 <0.05
3/9/2005 Pace 8:05 AM <0.05 <0.06 <0.05
3/23/2005 Prism 8:05 AM <0.05 <0.05 <0.05
3/23/2005 Pace 8:05 AM <0.05 <0.06 <0.05
4/6/2005 Prism 8:05 AM <0.05 <0.05 <0.05
4/6/2005 Pace 8:05 AM <0.05 <0.06 <0.05
4/20/2005 Prism 8:15 AM <0.05 <0.05 <0.05
4/20/2005 Pace 8:15 AM <0.05 <0.06 <0.05
5/11/2005 Prism 8:05 AM <0.05 <0.05 <0.05
5/11/2005 Pace 8:05 AM <0.05 <0.06 <0.05
5/25/2005 Prism 8:05 AM <0.05 <0.05 <0.05
5/25/2005 Pace 8:05 AM <0.05 <0.06 <0.05
6/8/2005 Prism 8:05 AM <0.05 <0.05 <0.05
6/8/2005 Pace 8:05 AM <0.05 <0.06 <0.05
6/22/2005 Prism 8:05 AM <0.05 <0.05 <0.05
6/22/2005 Pace 8:05 AM <0.05 <0.06 <0.05
Total # of Samples 24 non -detect 24 non -detect 24 non -detect